Tool holder



F. PRETSCH.

' TOOL HOLDER. APPLICATION FILED APR. 1. I920.

Patentd Apr.'18', 1922 2 SHEETS-SHEET l- .F. PRETSCH.

TOOL HOLDER- APPLICATION FILED APR. 1, I920- 1,413,490. P ten ed p .1 s,1922. v ZSHEETS-SHEET2.

6 AIS} Holders-of 'FnAn rRE'rscH; on PHILADELBHIAQEEN'NSYLVANiA.

- moor. -I-IOLbER. 1

To allwho'm; z'tmay 00ncem f v 5 Bel it {known that 1,. FRANK Fmirsom: citizen of the United States} residing at Philadelphia, in the county of Philadelphia; and, State of Pennsylvania, have invented new and useful Improvements in Tool. which the followingisa specification;- 1, My invention relates to a .new; and useful improvementin tool holders, and: has for its object to so construct such alholder that a;

, series ofretainingblocksmay be combined r .A further ob'e'ctof the inv naen .is to therewith in such manner as zto firmly hold and guidethe tooland-obviate thenec'essity} of slotting, the body of the tool. holder the reception of the tool. i

utilize a series ofzcircular block'sadapted- LWith these J L which. thisinvention. appertains, maynn holder. I

to receive the .tooliandhold .the lat ter in va rious angles relative to thelbodylof Q the holder. A ends *-view, this invention consists in the details of construction and combination of elements hereinafter set forth and then specifically designated by the. claims. j

In order that those skilled in. theart to derstand how tomake and use the sam e, II

will describe construction in detail, "re:

ferring by. numerals to the accompanying drawings forming a part of this application, in which i r Fig. 1, is a side elevation of a tool holder made in accordance with my improvement.

Fig. 2, is an end view of Fig. 1.

Fig. .3, is a plan view of Fig. 1,;showing V the tool set'at'an angle to the body ofthe Fig. 4, is a viewsimilarto Fig. 1 showing a modified form of, tool block adapted to: receive a tool but diamondshaped in cross section.

Fig. 5, is an end view of Fig. 4. V Fig.6, is a side elevation of the body of the tool holder.

rectangular in cross. section.

having diflerent width slots therein.

providing V for the accurate tools laced in the holder. 7 essary to adjust the tool at various angles 7 tothe body ofthe holder,"I use acircula'r h flc pf b a 001, d mond h p d cross sect on.

Ei ..14, isanend'viewdtFi g.13. a 5

F p an;viewof.a circular tool block; slotted to receive Ithetool diamondsh'aped-v incross section.-

i f na mymean-a.heater a. 6 .l1 epre e t if y o th EtoOl i om y-h v n n e ten n 2 fQrm t r -Ii,

with, said extensionbeing of less width-than; thebodyofgthe tool holderand this {exten- ;projects!-upwardf therefrom. it represents a ampfly ke ad i e t t- W i h six-.1. tenslon 2, and this yoke is provided-with a t b lt hich p s s. h ou h the low portion thereof, and bears against-theunder side of xt 'n ioia-z'whi h may. bflslbttdf 1 v for the .rec'eptionfor the endfof this iboltfso r I as t l t' thiqy k in s Pr pe ,PQS t Q i up n the stenswn. sv l berea i y. under;

stood. I

6 rep ese ts a2 6 1 l k hliesaidi i l e? f rme ear o l s lot thet libleekf 6Jwh1ohisadaptedtojfit overthedowel pi i,J

3 and, thus .position; andhold: the block in .pla lwh l f' eo is? be gaei si a 5111 tool block 6 is grooved .as indicat d sf f hreception of a tool 9 rectangular in crossv section, and this slot is intended; to be of a width into which the tool may snugly fit so as to hold the latter in proper alignment with the body of -theholder. I

When a tool'has been Placed in, the 601 blockand the yoke 4 placedaround the'jextension and toolthesettin'g up'o f the bolt. 5',

95. a. against theunderside of the extension will;

draw the upper-portion of the yoke upon the parts.

LIn pract1ce it is desirable toiprovide a numberfof the toolblocksG'each'of which has a diflerent 'width' slot therein for .the reception of difl'ere'nt thickness in tools thus iidance of said ere it is neci tl1e toolandjthereby clampthe tool in the j tool block and preventany movement of tool block 10 adapted to. be seated upon the extension T2; between the sidewalls ofthe yoke 4: and having a slot--11 therein for receiving the tool vThis will permit the tool to be set at various angles and firmly held by the set-ting up 01": thebolt 5 oneend or such adjustment of the tool being shown in Fig. 3. It is intended that a number of these circular tool blocks shall be provided for each holder and that each block shall have a different width slot'for t-he reception of tools of different thickness as it'is advan tageous to have the tool fit snugly within the slotted block. lVhere a toolot' diamond shaped cross-section is used the tool block-l2 for the reception thereof is provided with an angular or V shaped slot as clearly'shown' in Figs. 5 and 14, and when this formlot block is used it is desirable that it shall'be somewhat thicker than'the other tormsoi' blocks in order that the tool may extend backward over the body of the holder as clearly shown in Fig. 4:, but it is obvious that any of the blocks may be made sufiiciently thick to permit the'tool'to extend backward over the body of the holder.

By constructing a tool holder as shown as these may be varied withinthe' limits of the appended claims without dc parting from'the spirit of my invention.

Having thus fully described my invention,

- whatI claim as new and useful is 1. As a new article of manufacture, a tool holder comprising a body. having an I here. shown anddescribed relatively greatstrength extension of less width formed therewith, a tool block supported by; said extension a clamp yoke surrounding the extension, said yoke having a set bolt passing through one wall thereof for bearing against the underside of the extension.

2. A tool holder comprising a body, an

extension 'form edtherewith, said extension being of less width than the body, a slotted tool block fitted upon said extensiomayoke embracing the extension and tool block, a tool located within'said block, and a set bolt threaded through a portion of the yoke and adapted to clamp the tool carried by the tool block in position. i

3. In a tool'holder of the combination of extension being of less width than the body,

a dowel pin secured in the: extension projecting' from the upper surface thereof, a tool block having a hole therein for fitting over the projecting end of the dowel pin,

said tool block being slotted to receive a tool, a clamp embracing said extension and tool block, a tool carried by the lll3t61,tnCl

said bolt threaded through the lower portion of the yoke and adapted to bear against the underside of'the extension for clamping the parts together.

a body, an extension formed therewith said 4.. A tool holder. consisting of a body-,; an

integralextension projecting tromthe lower part thereofin endwise alignment with said body, said extension adapted to supportone of a number of interchangeable tool blocks, 7

and means to hold a tool in'that one of the tool blocks supported by said extension.

In testimony whereof, I have" hereunto afiixed my signature. V FRANK PRETSCH. 

